# -*- coding: utf-8 -*-
#
# BSD 3-Clause License
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# Copyright (c) 2017 xxxx
# All rights reserved.
# Copyright 2021 Huawei Technologies Co., Ltd
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# modification, are permitted provided that the following conditions are met:
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# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
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#   this list of conditions and the following disclaimer in the documentation
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#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
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# ============================================================================
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from __future__ import absolute_import

import logging
from logging.handlers import RotatingFileHandler
import os
NPU_CALCULATE_DEVICE = 0
if os.getenv('NPU_CALCULATE_DEVICE') and str.isdigit(os.getenv('NPU_CALCULATE_DEVICE')):
    NPU_CALCULATE_DEVICE = int(os.getenv('NPU_CALCULATE_DEVICE'))
logger = logging.getLogger()


def init_logger(log_file=None, log_file_level=logging.NOTSET, rotate=False):
    log_format = logging.Formatter("[%(asctime)s %(levelname)s] %(message)s")
    logger = logging.getLogger()
    logger.setLevel(logging.INFO)

    console_handler = logging.StreamHandler()
    console_handler.setFormatter(log_format)
    logger.handlers = [console_handler]

    if log_file and log_file != '':
        if rotate:
            file_handler = RotatingFileHandler(
                log_file, maxBytes=1000000, backupCount=10)
        else:
            file_handler = logging.FileHandler(log_file)
        file_handler.setLevel(log_file_level)
        file_handler.setFormatter(log_format)
        logger.addHandler(file_handler)

    return logger
